<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>

<script type="text/javascript">
	function jumpMenu(select){
		var i=select.selectedIndex;
		var selection = select.options[i].value;
		var url;

		if(i==0){
			alert("Please select a state");
		}else{
			url="http://www.50states.com/" + selection + ".htm";
			location.href = url;
		}
	}
</script>
</head>

<body>
	<form>
		<select name="State">
			<option value="0">--SELECT A STATE--</option>
			<option value="alabama">Alabama</option>
			<option value="montana">Montana</option>
		</select>
		<input type="button" value="GO" onclick="jumpMenu(this.form.State)">	
	</form>
</body>
</html>